// 侧边栏的背景
.el-menu-item {
  background-color: #1f2d3d !important;
}
.el-submenu {
  background-color: #324157;
}

.sy {//首页的背景
  background-color: #324157 !important;
}

// 侧边栏滑动触发
.el-menu-item:hover,.el-submenu__title:hover{
  outline: 0 !important;
  background: #48576a !important;
}